Starting Line VC
Starting Line is a Chicago-based early-stage venture capital firm founded in 2018 by Ezra Galston that invests first checks into consumer technology startups nationwide. The firm concentrates on consumer AI, consumer health and longevity, Gen Alpha / Gen Z, consumer mobile, consumer fintech, and consumer marketplaces — as well as the infrastructure that supports them. Starting Line typically writes first checks of $500K-$1.5M (optimally $750K-$1.25M into a ~$2.5M seed round), maintains a roughly 2:1 initial-to-reserves ratio, and makes about 6-8 new investments per year. It has raised three funds — Fund I ($17M, 2018), Fund II ($30M, 2021), and Fund III ($30M, 2023) — and is headquartered in Chicago with portfolio concentrations in Los Angeles, Austin, and New York. The firm is known for radical transparency, open-sourcing its operating manual, quarterly LP letters, and mental health policy on GitHub. Notable investments include Cameo, M1 Finance, Substack, Hungryroot, Shef, Soona, SpotHero (acquired by Uber), and Pretty Litter (acquired by Mars for ~$1B).
Starting Line VC has 64 portfolio companies tracked on the APIs.io network, of which 20 (31%) publish APIs indexed here. The remaining 39 are tracked as profiles without a published API on the network.
Its highest-rated API providers on the network are Sunbit, Substack, Forum, Pinch, Clyde.
Portfolio on the Network
Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.
Emerging 8 Early or largely undocumented
Minimal 3 Almost no public developer surface
Rest of Portfolio
5 further portfolio companies that don’t yet have a provider page on the network.
Scroll for all 5
Properties
Cohort brief
Auto-generatedThe 50 portfolio companies with APIs in the catalog, backed by Starting Line VC, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Access Clarity | 27.1 | 26.5 | +0.6 | 50 |
| Discoverability | 55.7 | 58 | -2.3 | 50 |
| Contract Governance | 2.9 | 7 | -4.1 | 50 |
| Operational Transparency | 7.4 | 13.2 | -5.8 | 50 |
| Developer Ergonomics | 14.4 | 23.8 | -9.4 | 50 |
| Contract Quality | 7.8 | 17.7 | -9.9 | 50 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 12% | 15% | -3 |
| MCP server (first-party) | 12% | 13% | -1 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 4% | 12% | -8 |
| Security | 100% | 98% | +2 |
| Arazzo workflows | 2% | 2% | 0 |
| Governance rules | 10% | 18% | -8 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
- 1 Forum {"score" => 44.6, "band" => "agent-native"}
- 2 SpotHero {"score" => 39.1, "band" => "agent-ready"}
- 3 Substack {"score" => 32.7, "band" => "agent-ready"}
- 4 Agentio {"score" => 32.7, "band" => "agent-ready"}
- 5 Classet {"score" => 26.1, "band" => "agent-aware"}
- 6 Hot Mic {"score" => 24.5, "band" => "agent-aware"}
- 7 Pinch {"score" => 23.7, "band" => "agent-aware"}
- 8 Sunbit {"score" => 23.6, "band" => "agent-aware"}
- 9 Cargado {"score" => 21.2, "band" => "agent-aware"}
- 10 Imgflip {"score" => 19, "band" => "agent-aware"}
Coverage caveat. 47 of 50 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 2 November 2026, across 37080 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.